SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95b8ba1923406171e25ceb5c5c30da6380cc5b82000cd0bacf3283ac7767f0da' 
  AND token = 'KTJIFo+KO4Xhwnonnd5jpwWjhiCmMAda/IIZ4c+wiVg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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