Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2efa9db8018c1b7c8784d620d63a1611f2f376e3bbb81263d2973ab3ee194b6' 
  AND token = 'wfhaHGPiJW+vz+Jtp52Ryg2R5l1x28kniKR3Ru8/DXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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