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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '01d13fa30d8f384ca8b8171caa386e61b6455bc2c5d2cf51aaa9bb10fbe44147' 
  AND token = 'GXYJOetiC8souzoOr7MMnBOCRjyrA8d0cp5x0Jr7C80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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