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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0e5606838e22aed80b9dbe4fc661745dca7d6c63ee099a5c1c08e44725fd62e5' 
  AND token = 'qOgVj2j6b9UPQgnp2wqGkkdcAoiXHBlu5bj8zhei0IA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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