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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'abbf6f1556eda196e9bc45981bf64b63e62c591e90de75f12b530e3f08a9596c' 
  AND token = 'iLd7LZrX9CIJ09EYVgT3fkGOw0S0kJGfpRJyo3j8ZU4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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