Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '794719b8f1b28c0b6761c115b634df54963b534efbd578a1da145cf739d730c5' 
  AND token = 'vvu2U02CcTuCUr9cDFTq4qcME8AXoC6TsAOfYnv0C1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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