Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6c08cadde1ef93d77a474b6d73f338db10e2566f5cf26d3d612f64f814d0c10' 
  AND token = 'JFH4JyJhY9ECP6olRtNpgXWa2v0Nox49U0DpUlVULSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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