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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05371f5808394d992fdf0f84037339a7bebb3eb6b1d9b3217bc26f1f7fd8db27' 
  AND token = 'yO213LR3aRKONM/aXbjmCMgtL/PKUcY/qrbYrXdo+6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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