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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '03744bf1d037a68ebf03c8c85fed681c3ec84a63e1400261f678c8f537437009' 
  AND token = 'Qwhat7blwNJRDjSl6dgzyJEpWkoAwa3C5IPjOW0lFlA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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