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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '415be566bbea4d9b2511e90c075cbf54d34118e38b6402f91e890e2c31bde34d' 
  AND token = '4kYVweKIc6ahnN/glweci86xyRVnb4z384/KSn+Dy+g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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