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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '227ce3c930092f51ce294a04e4361c66ef9bcbf5df8eead722e52d620a741f97' 
  AND token = 'eAJz+qJexxKXs4f7en2KViH4Aysxi8xE+wsv/+JUY7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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