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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dab1829afceaea626baa4ac9f6397663a07f2eee0e4f8d09e646540e3251d65e' 
  AND token = 'izSvkK7u/vykb5A6kb1pxVR4/YxHldLYk86Ok3rRspU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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