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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63213926978958671a8c3955444de794a0cca7dc0bf03b7f8c03a665e77db323' 
  AND token = 'D98soyGNcACIyMCBZJ54MkjdZ6HRHASqNxXYvqSYAMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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