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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb10b579c1576eb1836d900ea42301037c1de63ec1d485ee8c1992f9c3dd91ad' 
  AND token = 'aZnD/PItYdHMAorIL/GdoMk7eu62REys2tozeEKdqHQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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