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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad2d85b5b9265dc1cec6c9ec7b7db9083c42b6ac71275b8668c4c125c30adefc' 
  AND token = 'rf2UDjpHspnnClMuGsK9KkipsGqpcXM0dWIJBIJ4bls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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