SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b0bf127bbd85bab20ddb4edf923a2569bf767d7b3119a4e2c48b7e7877f1b8ec' 
  AND token = '6iRxrTZaAyWsYi6ID1RAggyVvynG/vpg3CGHYCB+SPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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