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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '896c647e11713cf39830cae23ea97a2e62256c6dd9122df985df666aebb7e246' 
  AND token = 'XVSU3BKWpx+hhkI3tVjZlS2OLq6UsIuD0c4+uTv0WPU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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