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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f46969437fc40aadf2ec9026f6cd43fede9e36ef151a383c4323c160ea8bcd54' 
  AND token = 'bhHVTisY0zNPf4Jc9IzVS65YnxnA5ef0ly7Y3eJ3X1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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