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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cd1168949f4a05833a1d331ba8a8efa974a606a49aa7305e0ad4e142ab98c86' 
  AND token = 'I4RCIhVrjQ4FCM2zNB89WuYiFcVgQ3oWcpqbAw9x0l8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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