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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90286b036115c70f6b7c69907c855cc84838cd3a00f4891cb2492fce092e6fb5' 
  AND token = 'mye3RqgzmwfgE/kJy6TRE/n7ttmeQPXdJKuOb3gh4kM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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