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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f133d0fc410dc0866ad893f556a18c0b67eb7472d0b0448653e3533ab191e48f' 
  AND token = 'WdwlTMSi5PvYRARt1MwxuEPNc94zTUWagPCNRdI8a/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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