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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13d69d54e366c55062ae7877bd89bc6b555f0db07e51c90547122de9865d346e' 
  AND token = 'F+xCgHnl2MJzwn0PdULij2gSQqZPQv35oS7fray6srU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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