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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ab0bd75391112b09e5319cf03e31e1cf2288ff07b9a106f0c8cfe7148f246437' 
  AND token = 'd14k7TT2IQd3cvRoJ4bfrWZ2tGY6iox62Rrz05y3qF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}