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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'aa73de9cc17cf275f7d57391c8bfed0c76cf0df3b0f08a152f43cc303bbe14ca' 
  AND token = '4T6cO5pNVPJO3IM6ZtokNmr1Z4SDQ3ryCkOL/f8BvTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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