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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a54a52f1634d36c6b90000063aa3b0b0d9a2d08d006215fccd2f80bb821367ae' 
  AND token = '0E5payjn3CImp79kVR9c54rUZyA+OWb0ona/uUIVXk8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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