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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01ab307763ede128fac636d2259606e2b5f6f68f8e97685202b61aa3edd81404' 
  AND token = 'q/woXzZ/Pc6PoWo4SnZ4lrD8UsXdef2Oo/mIUEh0Xsc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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