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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25c3db5ffc25616b794ab7a000c7ee9260a8f5d5fa22295886acbdcc1e6963f0' 
  AND token = 'RHXgEWHPrSqJ3elckMfZQaYNb6YDJItKkOwfac1PaGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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