SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2621ee306fc596c7776a7ac42b2214091bc82fee64a21fe57815f455388b9c78' 
  AND token = 'PGnEvlIGvVwEgJZqTwJ7gUN1A52CwYR6/vx6TyQflo0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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