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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60012b19c7fc711d9cbb72cc97531c0db691b351ec42e73fa4ae05d1871ca081' 
  AND token = 'xfx9k79a6ebZJW0PcFIYAfXRrqaTMfd1M98sMbDXOjI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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