Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78ae0aaeb872911902037a3a3bd28a7cc50c065991146b31347b203f9c5e4cb8' 
  AND token = '+Pc70seIgs4iXTL3AbGqLf+dNmj+B240R1p0fonHE00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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