Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2152bead0857b31c80d1b0f64c0f77f93113c9e0b7bdbac26c6948a40a1e76a' 
  AND token = 'QOFB5PcANVOrEG/75fSE6lswmHoCVs7rH6mYsDfJH+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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