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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdad3f3f60711c98e33a2ca03fe7744a8813c2386a2d6f5798fcf850137d35b2' 
  AND token = '/0GseRcH6ve0xOcSTfMCAy+jzkeMzOe0PPdADRQaJYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}