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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac35b7f16e15ff7031df744c6fa0f99fa964a396df12f6bd34e909266a9e415f' 
  AND token = '2OoQmU/v32BYJ9jyZ46p2luCit7fVrJnenI+UVNvN6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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