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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c239ca32d7d250d01f7fb0571030488ac73ae70b34b4ad4e62a4d6670613b6ee' 
  AND token = 'NJK5gKNmRrRaUMvNe2nPwEjNgzP+4/8GkTp7TR33ack=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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