Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01dff04387bb199e608e989ef3557e24230a3873f7dc82472753f2485a0dfe6a' 
  AND token = 'sMHTQESLGjf08Vt5MnygUa3W/xwZ2zsas0TXw+fLncE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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