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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a59b66df895e25bf16816873d7c4b5a3cf188293b625d93d2ba7bd505270e9f3' 
  AND token = 'O2Wk1DNnyHH5pSlKGS28WN8Z0fGgJ229jQe4OUCh61Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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