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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e36df3ef16357b6836d2c2cb0727fa29ec6628bbc37a857b5f92d161f85b0b1f' 
  AND token = 'vtlZbONbflM+vVe01syPcBEKxErhnS5o2zKNArRb9nU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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