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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f8c99f46152468570ddef1b9cc4752edcc44b783e5285403a8ddf80090d30dd7' 
  AND token = 'tcqWtYhxXlRT6RXs8JEDdQ7mvubwMK4PXunPFGQfcG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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