Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e62a26568958e61ade3013dcc0fe4a992534d187ed37c7ae90b7487ec9a8063' 
  AND token = 'WtyESVFhLpu2QN/YuPKYGysY6AKC2bhCQcTgHru4ZhU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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