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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '026a171a1c0f0ad9eb6c0a7e93b2383f050ce2544b4041b1a3fbdaec28f35023' 
  AND token = 'tqrx/7itx2RfxTXeC1wph3XlvZgjpz3NFEqdx3RI7Ck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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