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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df2325c3b13cc2e0914efcc29d1a1ae361db145dda925ad2b5e49e0564f1a628' 
  AND token = 'PzLJ1oluX9BYOdJkDEfa5zK6ipHK1V918hoIYkKw+s0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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