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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fa37bfb6608e9141d0756fe92453ef57013bb7b051cebed2c47c5f5ab6e7fb5' 
  AND token = 'EM6m07KPwEYlXX7PV7E8NIQyyfa/i3qkF1HuslQ/J14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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