SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efbb4ee62cff249b0bf4455e80e982583b0e1819e926925950c8f5b74714d83b' 
  AND token = 'lag+9KCTKKY7D5KChu+Fx0jwzdxol7VMaq0qlZUREVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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