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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05fd65555b025bbe9367c3ec184e9973d3077443d0db80cb1ac9692c1334e64c' 
  AND token = 'qYtlXcvUKpr5da4xzMPDNf/CEaIRLmzEvc6JVhUxWUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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