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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee04d6585a565f99a0af1d177b7877a7b809f91adab9998cc1026500e5a7868d' 
  AND token = '32MdIoP4NTPq9ZTI3XruCrJkdO3AbU6k8R6cBC4lytA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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