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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0c616150842af951f8b6a33ce2ad384d6f354b828e93ab2630bd4f491724fee' 
  AND token = 'Oq+fJa3KAYmVIPXkrc1CxW3VrtEOy350n0V8ZOWMdik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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