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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04590cca5a6f357159083ec785b65686ab2027e1cfd4ed3a61272591cf0668ce' 
  AND token = 'oY6M6CNID+gvE7VC+w0rjpkrJ284VzWWBNfQkTaW6nw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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