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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8005f9ce5e5b92ac2711c215815a467256073a32ccac2f84910d32149d5fe190' 
  AND token = 'baGWucOmK9g6XVzu4TaZ+ck4YbOM5ga3YFJ7IZKWTns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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