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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5515e221124faa485a3f9b7b18e1ac0bd318f9d5ae9b85fc7736693f415ea2cd' 
  AND token = 'Cui9YLmJ69RnQayMwPV5wmDeErlPZzoYpZS0mZiE8sI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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