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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad43d29005d96cb535da3f5fc8f12a35832bde08bbbf05954b0eff1f3bb42cc8' 
  AND token = 'jEsk0IGSq2GBEnmL3CoxPWuBCoTmV6kxt4VREmhLeTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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