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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1486f6383552904297ca2a6effac2247ed8854bafa897d1ab0045bb1818375e9' 
  AND token = 'Gwa1wPRV3ACd9WiwfJl1FnNCvOybA6Ew0E2B15RK3WE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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