SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c9a205b4cbbdc4b7fc693fec4f68d7d4e6d97be666f5f4d94b33377c88862cc' 
  AND token = 'ngGls/cmCevmZo+PbBh31rtupDSdtVFqkFp2TjW6q1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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