SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd89caa61f501f08a0d37ea9a80f871eb930082916308cebdeddafc246ae54145' 
  AND token = 'H6b2gpFm+54WVq37w0ZqcbK5MLf3RBdiwJuOLJ/6/QY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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