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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '199c2523b030e3e0b123a8117b8d41e4da6806135a428e14127002e81d8f26bd' 
  AND token = 's889xUA83/jf5WP1ylFE4cLodJBK9Y3FkWIKXb0ouGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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