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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd57476a08c0f6e1633c0b905f0cfb65cc32e7a4108fab286410f752301517535' 
  AND token = 'fQzF6z1qIDBr6xS9R7lu5z2tYdh0rzxBLtmNj9mV1f0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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