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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed8034e6194f1979e82ae16e05a0549fa15b285c665f0424645dcb47f8eaa838' 
  AND token = 'qnNUILdEupbh5Dps5PNH5QllCazX3C9t6YFsAZVViSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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