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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '363732e9b9056e77c8d2ba49fb9758f2dba5f4e2a3bab861bfbe02aa7a5c5902' 
  AND token = 'tfEx3qdeTZzEKB0l32m41r7hLXy9ZddVd+h5AKQn4V8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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