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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdbe38f0bccaaa74a1fdae92fb94462910f7587f5325f7deddc9ad5fee282f92' 
  AND token = 'UV+EbAE2Y19Yvgbh/SrSvajDKKsETue43254QzOInIs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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