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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ad33a059949ef9339e2df4773e64f25e119d711efc49c21105d90700d9a1064c' 
  AND token = 'Yy1N1QBJb3dk4xJBztXh5i2Mbg5TQqVC0mVn/y1cPAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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