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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '620629403e65bc591d170c60bc3c4c54c53ab55aa983b9b4eb6af2b18dc22bd8' 
  AND token = 'lf3nukWzR8Eqvx3/7j/mz97Kt2bfz77TtTQ7XX6s4sU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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