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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24fec1793d6078eef40f6c512b0ede3c39c7a6d656f1410a2b92f02632823266' 
  AND token = 'kMmXV9FSe0cTQ+0x2+hhfC2EKrc6daAEVlcXjvm8g30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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