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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '4ddea8983c66ad9502a38607003098a8a0c0075cb6b5b2ca3eafdca31bb6770a' 
  AND token = 'Upbv6cICXqG8JxKhJ9szuemCuXWjuFeplYY1OSXMfCM=' 
  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"
    }
  }
}