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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60d33449efe02f7f47f9e57d0ac7af62a2e4ab5267b8e0dd22f056de127700b9' 
  AND token = 'HDkrQzY9WDRQQrv8UD6KJ01wLY6ljX48QKstuUewoPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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