Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '400e5e6094f846991342b1898578611bdeae9e37ea4c1c90b4efab1cf726b961' 
  AND token = 'EMV3ljzo9B3CGcr2qgb1MOGcn89RXcCvpzBttIaCnqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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