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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7825f3a00ca1a96a8f7816d5baa65085f2fd0c7ce52ca6a4c4b2cedc0f8aae6f' 
  AND token = 'JF1AFA5/HFyyKq87EzzLmo0v9ids0p5La+JfIvJC3uM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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