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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '024c13616fe16a184d7c69f46e8c19d428b4426d8dc964c5455874b01870d48e' 
  AND token = 'l5zNw93lvPyoV2tXJQ1+Qyd7BqSD2Z+F8obdI4Hgc5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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